Grease-extractor



(No Model.)

W. D. NELSON.

GREASE EXTEAGTOR.

No. 395,401. Patented Jan. l, 1889.

dIlnirnn STATES l Parenti irren.

IVILLIAM DANIEL NELSON, OF SAN FRANCISCO, CALIFORNIA.

G REASEHEXTRACTOR.

SPECIFICATION forming part of Letters Patent No. 395,401, dated. January 1, 1889.

Application tiled (inne l2, 1888. Serial No. 276,812. (No model.)

.To @ZZ 'whom t may concern:

Be it known that I, WILLIAM DANIEL NEI.- SON, a citizen of the United Stat-es, residing at San Francisco, in the countyof San Francisco and State of California, have invented a new and useful Improvement in Oil-Traps or Feed- 4Tater Grease-Extractors, of which the following is a specification.

VMyinvention is an improvementon the device for removing grease and other extraneous matter from feed water `for which United States Letters Patent No. 366,864 were issued to me on the 10th day of July, 1887, and relates to oil-traps or feed-water grease-extractors for marine or stationary boilers, in. which I have constructed suitable devices an d mechanism for extracting oil or gi se that is used in cylinders of condensing- 'venting its entering the boiler with the feedwater.

Figure 1 is a top view oI my improvml oiltrap or .filsedavater grease-extractor. Fig. 2 is a similar view with the cover removed. Fig. a vertical section on line tc tu of Fig. 4 is a vertical section on line rrr of Fig. 1.

Similar letters of reference refer to similar parts in all the figures.

The object of myinvention is to provide for a change of the iilterin g devices and materials While the engine is running without cutting off the snppl57 of feed-water. This'object I attain bythenovel arrangement of parts hereinafter described, and more particularly pointed out in the claim,

A is a cast-iron or other suita-blcbox, preierably of the shape an d proportions shown in the accompanying drawin gs, and of anyv convenient size to suit the size of the steam-lmiler with which it is to be used.

B is the top of the trap, provided with openings 1 2 3, leading to three communicating chambers, C D E, of the trap.

F is a conduit for the feed-water to flow through when the screens or :filtering material require changing during the running of the en gine. y

G is the inlet-pipe,a1nlIl is the outletfrom 'the trap.

I is a two-way valve connecting the inletG vwith the iiltering-chamber C when the water may ctmtain. Chamber C has perforations -l or a grated` bottom, and is filled with curled hair, horse-hai r, eottomwool, sponges, and pulverized glass. I sometimes use one of the above-named liltering materials alone, and sometimes two or more of them together, according to the amount of oil or grease in the water.

lVhon l use pulver-ized glass in chamberC, I place a layer of sponge next to the perforated bottom to keep the glass from beingI lwashed through the bottom of the chamber. Chambers D and E are separated by a perforated wall, Il', wire-gauze screen Il, and flannel screen 5. Said screens are held inv place by a frame, (l, fitting into a suitable recess, 7,

j in the perforated wall H, and is secured nhines and prethereto by bolts or screws S.

I is a conical valve fitting \\'atertight into its seat 9 in wall II. The stem l0 of valve I passes across the conduit F through a stuffing-box, 10 in the well-known mann er. Valve I is worked by a hand-wheel, Il... K is a tightly-fitting cover, securel51 fastened in position b v a central hand-screw, L, seated in a cross-bar,l\[, which is supported on pillars] 2, as shown in Figs. l, l, and at.

In use my invention operates as follows: The water to be cleaned of oil or grease enters the trap through inlet G, passes through the iiltering material in chamber C,thence through the perforated or grated bottom i into chamber D, from chamberD through Vliannel screen 5, wire-gauze screen i, and perforated screen or wall H into chamber E. From chamber E the purilied water is allowed to pass to the ontletll. lVhenever it is desirable to change the filterin material contained in the chamber C or the lflannel screen, or anyof the other screens, or to remove sediment or refuse from chamber C or D, I first turn the two-way valve to the position shown in Fig. 4, and close valve I', as shown in the same figure. This will cause the feed-water to pass through conduit F during the cleaning of the iilter or trap. Then I have only toloosenhaud-screw L. This will enable me to remove cover K. Then I remove the greasy filtering material and screens before described and replace the same with new or clean ones. The cover is then replaced, the hand-screw L is screwed down,

IOO

and valves I and I returned to their former Ina feed-Water oil and grease extractor, the positions, so as to Cause the feed-Water to pass combination of the two-Way oook I with filterthrough ohainbers C D E into outlet H', and ing-chamber C and auxiliary passage or oonthe filtering devices are again in good Workduit F, Valve I,ohambers D and E, separated 5 ing order. byiiltering-soreens,and the outlet-pipe H, as 15 I do not claim, broadly, an auxiliary oonherein set forth. duit for the feed-Water to pass through, as thatl VV'ILLIAM DANIEL NELSON. feature is shown in other patents. Titnessesz What I olaiin as my invention, and desire OTIS V. SAWYER, 1o to secure by Letters Patent, is* JNO. R. HILLMAN. 

